· Autism spectrum disorder is a neurodevelopmental brain disorder characterized by persistent deficits in social communication and social interaction across multiple contexts and patterns of behaviors. In addition, the diagnosis requires the presence of restricted, repetitive patterns of behavior, interests, or activities. ASD occurs in all racial, ethnic, and socioeconomic groups. It is about four times more common among boys than among girls. Research reflects the scientific consensus that four previously separate disorders are actually a single condition with different levels of symptom severity in two core domains. Those four disorders with their previous names are: Autistic disorder or autism Pervasive developmental disorder not otherwise specified.
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